Seeking a linux shell script for to compare last modified file time.

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October 15th, 2003, 05:07 PM

bcyde

Me likey breadsticks...

Join Date: Jan 2003

Location: Los Angeles

Posts: 1,189

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Seeking a linux shell script for to compare last modified file time.

Not sure if I should've posted this in Linux or scripts, but I'm basically looking for a bash shell script that will be able to check for a files properties to see if it has been modified within a set amount of time. This is because where I'm hosting my site doesn't allow FTP so my webcam updates to my own linux server, and then I'm going to run a cron script that checks the files properties and if it's been updated in the last 5 minutes SCP to my website.

I've been trying to do this as a bash shell script however I'm having trouble finding either the right function to get the date properties or parsing text.

Right now I was approaching it by trying to do a stat -t on the file, however I have to either parse the output of stat or try and read it into an array variable.

I could get this done a whole lot easier, by just using PHP with wget in my cron, but I figure a bash script would be cleaner (less files) and would also be pretty simple if I just could find out the proper function/syntax.

-b

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October 16th, 2003, 12:23 PM

bcyde

Me likey breadsticks...

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Location: Los Angeles

Posts: 1,189

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I figured it out, if anyone ever needs something like this here it is for posterity's sake (I'm a newb in linux shell scripting so feel free to point and laugh:

PHP Code:


		
			
#

#Ghetto auto SCP script Bryan Encina 10-16-2003 

#

#Assumptions:    passwordless SCP has been setup via generation of private/public

#        keypair and insertion of pub key to webhost user's 

#        .ssh/authorized_keys file

#Intended Use:  uploading webcam image from linux server to another webhost

#        that does not support FTP (only SCP), probably of no use to anyone else

#Usage:        make an entry in your crontab to run as the user who's setup for passwordless scp

#        to run this script with the path to your webcam img as a 

#        command line arg        



#user settings edit the vars below

checkduration=300          #if current - timestamp is less than this we have a new file default to 5 minutes

remoteuser=myremoteuser    #user at remote host

mydomain=mydomain.com    #the domain/ip of your remote host

destpath=yourfile        #the path to your remote file



#do not edit below unless you know what you're doing, but if you did you 

#wouldn't be using this and you'd be writing your own wouldn't you?

localfile=$1



cur_timestamp=`date +%s`

my_stat=`stat -t $localfile 2>/dev/null` read name size blocks unk uid gid dev inode links unk2 unk3 last_access last_mod last_change ioblock << ENDHERE

    $(echo $my_stat)

ENDHERE



if [ $last_mod ]

then

    time_diff=`expr $cur_timestamp - $last_mod`

    if [ $time_diff -lt $checkduration ]

    then    

        #echo This is a recent file

        scp $localfile $remoteuser@$mydomain:$destpath

    fi

fi

January 8th, 2004, 08:15 AM

adesigno

Junior Member

Join Date: Jan 2004

Posts: 1

Time spent in forums: < 1 sec
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HI,

is there any ohter possibility to to see if a file has been modified within x minutes.

On Linux I use find -cmin but under HP-UX -cmin is not available.
Also stat -t is a good solution on Linux but again the comand is not available on HP-UX.

Is there anybody that kwows a solution under HP-UX to find out if a file has been changed in the last x minutes.

Thanks a lot
ad

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